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Article

Study of Water Productivity of Industrial Hemp under Hot and Dry Conditions in Brandenburg (Germany) in the Year 2018

Leibniz Institute of Agricultural Engineering and Bioeconomy e.V. (ATB) Max-Eyth-Allee 100, 14469 Potsdam, Germany
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Water 2020, 12(11), 2982; https://doi.org/10.3390/w12112982
Received: 28 September 2020 / Revised: 16 October 2020 / Accepted: 21 October 2020 / Published: 24 October 2020
Hemp (Cannabis sativa L.) is a high-yielding multi-purpose crop, but its hydrological functioning is poorly understood. Studies on the interception processes in hemp have been lacking so far. This study contributes to the understanding of the influences of evaporation of intercepted water and other hydrological fluxes within plants of two cultivars, “Santhica 27” and “Ivory”, on the water productivity. To determine water productivity and evaporation from interception, field measurements were conducted on plants of both cultivars at different stages of development. Precipitation (P), throughfall (TF), transpiration (T), and volumetric water content (VWC) were measured along with leaf area index (LAI) and yield of selected plant components. For the entire vegetation period, the cumulative P of 44 mm was converted into 13 mm TF (30%). The inferred evaporation of intercepted water (I) was high at 31 mm (71%). For the assessment water fluxes, the evaporation of intercepted water must be considered in the decision-making process. Besides the LAI, the plant architecture and the meteorological conditions during the cropping cycle seem to be the main factors determining I in the case of plants of both cultivars. Water productivity (WPDM) of the whole plant varied between 3.07 kg m−3 for Ivory and 3.49 for Santhica 27. In the case of bast yield, WPDM was 0.39 kg m-3 for Santhica 27 and 0.45 kg m−3 for Ivory. After the propagation of the uncertainties, the bandwidth of the WPDM of the whole plant was between 0.42 kg m−3 and 2.57 kg m−3. For bast fiber a bandwidth of the WP between 0.06 kg m−3 and 0.33 kg m−3 was calculated. The results show furthermore that even with a precise examination of water productivity, a high bandwidth of local values is revealed on different cultivars. However, generic WP values for fiber crops are not attainable. View Full-Text
Keywords: farm management practices; rainwater productivity; rainfall interception; leaf area index; plot scale farm management practices; rainwater productivity; rainfall interception; leaf area index; plot scale
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MDPI and ACS Style

Drastig, K.; Flemming, I.; Gusovius, H.-J.; Herppich, W.B. Study of Water Productivity of Industrial Hemp under Hot and Dry Conditions in Brandenburg (Germany) in the Year 2018. Water 2020, 12, 2982. https://doi.org/10.3390/w12112982

AMA Style

Drastig K, Flemming I, Gusovius H-J, Herppich WB. Study of Water Productivity of Industrial Hemp under Hot and Dry Conditions in Brandenburg (Germany) in the Year 2018. Water. 2020; 12(11):2982. https://doi.org/10.3390/w12112982

Chicago/Turabian Style

Drastig, Katrin, Inken Flemming, Hans-Jörg Gusovius, and Werner B. Herppich. 2020. "Study of Water Productivity of Industrial Hemp under Hot and Dry Conditions in Brandenburg (Germany) in the Year 2018" Water 12, no. 11: 2982. https://doi.org/10.3390/w12112982

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